Detachable grain-drill shoe.



No. 643,4l0. Patented Feb. l3, I900. T. J. HOWE &. H. N. LABARE.DETACHABLE GRAIN DRILL SHOE.

(Application filed Sept. 8 1899.) (No Model.)

THQMA: J. H OWE HENRY NJJHBARE IR ATTORNEYS.

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WITIY ESSE SI m: Nonms PETERS co Puofau'mq, WASHINGTON, n. c.

llwrrnn STATES PATENT Grinch THOMAS J. Howie AND HENRY N. LABARE, orOWATONNA, MINNESOTA, ASSIGNORS TO THE OWATONNA MANUFACTURING COMPANY, orSAME PLACE.

DETACHABLE GRAl N-ljR lLL sl-io.

SPECIFI CA'I'ION forming part of Letters Patent No. 643,410, datedFebruary 13, 1900. Application filed September 8, 1899. Serial No.729,802. (No model.)

To ctZZ whom it may concern:

Be it known that we, THOMAS J. Howe and HENRY N. LABARE, of Owatonna,Steele county, Minnesota, have invented certain new and usefulImprovements in Detachable Grain-Drill Shoes, of which the following isa specification.

This invention relates to the shoes of graindrills; and the object ofthis invention is to provide means whereby the drill-shoe may be readilyseparated from the shank and dragbar, so as to permit the shoe to besharpened or to permit a new shoe to be substituted therefor, ifnecessary.

The invention consists generally in im proved means for attaching andlocking the removable shoe to theshank and drag-bar.

The invention consists, further, in the constructions and combinationshereinafter described, and particularly pointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure1 is a side elevation of a grain-drill shoe embodying our invention.Fig. 2 is a plan view. Fig. 3 is a longitudinal section showing theinterior of the hollow shank and showing in detail the mechanism forsecuring the shoe to said shank.

In the drawings, 2 represents a hollow shank or tube of ordinary formand construction, through which the grain is dropped by the mechanism ofthe drill. At its lower end the shank 2 is provided with aforwardly-extending projection 3, to the upper part of which the end ofthe drag-bar is secured by a bolt, rivet, or other suitable means. Thedragbar 4: consists, preferably, of two members arranged with a spacebetween them and preferably curved near the shoe-shank to fit the curvedupper edge of the shoe 5. The shoe is hollow and of the usual form andreceives the projection on the lower end of the shank. The shoe is openat its rear end, so that the grain passing through the hollow shank ortube passes out of the rear end of the shoe and into the drill formed bythe shoe. The two members of the drag-bar diverge at a point preferablya short distance forward of the forward end of the shoe, as shown inFig. 2 of the drawings. WVithin the hollow shoe we provide a suitableblock or lug 6,

preferably held in position by a pin 7 or other suitable means. One endof the block may be of rounded form, as shown in the drawings, to fitwithin a socket or recess of corresponding form in the forward edge ofthe projection The rear portion of the shoe is thus supported by saidprojection and is firmly held in position. Between the two members ofthe drag-bar and at a point just in front of the shoe when in positionwe provide a cam-lever 9, adapted to engage the inclined forward end 10of the shoe, which is arranged to pass between the two parts of thedrag-bar.

The shoe is secured in position by causing the block 6 to enter therecess in the forward part of the projection 3 and raising the forwardend of the shoe between the two parts of the drag-banthe cam-lever beingin the position indicated by dotted lines in Fig. 3 during thisoperation. The lever is then turned to the position shown by full linesin Figs. 1 and 3, and the cam-surface engaging the forward end of theshoe shoves the shoe backward until the block 6 is firmly seated in therecess in the projection 3. The same movement of the cam-lever alsoraises the forward end of the shoe and brings each side plate thereofinto close contact with the under side of the corresponding member ofthe drag-bar. This is accomplished by the camsurface of the lever comingin contact with the inclined forward end of the shoe. This inclinedforward end of the shoe is in the form of a lug that projects betweenthe two members of the drag-bar and is therefore of substantially thethickness of the space between said members, while the top of the shoeitself is substantially of the thickness of the drag-bar and when inposition fits closely against the under surface thereof, one side of theshoe fitting against one member of the drag-bar and the other sideagainst the other. The cam-lever is also preferably provided with theprojections 13, which prevent the end of the lever from passing at anytime downward through the space between the parallel portions of themembers of the drag-bar. When the lever is released, however, it isthrown over to the position indicatedin dotted lines in Fig. 8, andthese projections pass be tween the members of the drag-bar forward ofthe pin upon which the lever is pivoted, the space between the twomembers of the drag-bar at this point being sufficient for this purpose.It is not intended that the end of the cam-lever shall strike the top ofthe dragbar when the shoe is locked in position, but the partsareintended to stand in the position shown in Fig. 3 of the drawings.Should there, however, be wear of the parts the end of the lever mightcome down to the top of the dragbar, and then these projections wouldcome in contact with the drag-bar and prevent any further movement ofthe lever. When the lever is thrown forward into the position shown bydotted lines in Fig. 3 for the purpose of releasing the shoe, a space isleft between the forward end of the shoe and-the'lever, and the shoe maythen be moved forward until its rear end is disengaged from theshoe-shank, and the shoe may then be readily detached.

The shoe, it will be seen, is readily detachable. There are no loose orremovable parts. The lever forms a permanent part of the dragbar, andthe other devices are permanently attached either to the shoe or to theshank.

We do not confine ourselves to the details of the construction hereinshown and described,

as the same may obviously be varied in many particulars withoutdeparting from our invention.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent- 1. The combination, with the grain-drillshoe-shank and the drag-bar secured thereto, of the removable shoe,means for securing the rear end of the shoe to the shoe-shank,audacam-lever engaging the forward portion of said shoe and locking thesame to said drag-bar.

2. The combination ,with agrain drill shoeshank and a drag-bar connectedthereto, of a detachable shoe, means for securing the rear end of saidshoe to said shank, a cam-lever pivotally supported upon said drag-barand adapted to engage and lock the forward end of said shoe, for thepurpose specified.

3. The combination,with a grain-drill shoeshank, and a drag-bar securedthereto and consisting of two members,suitably'separated, of adetachable shoe, means for securing the rear end of said shoe to saidshank, a camlever pivotally supported between the two members of thedrag-bar and adapted to engage the inclined forward end of said shoe,for the purpose set forth. 4

4. The combination, with the shoe-shank and drag-bar, of the detachableshoe, means for securing the rear end of said shoe to said shank, saidshoe being provided with an inclined forward end adapted to pass intothe space between the parts of the drag-bar, and a cam-lever arranged toengage the inclined forward end of said shoe, for the purpose set forth.

5. A grain-drill shoe, having means thereon for engaging a shoe-shankand having an inclined forward end-adapted to be engaged by a cam-lever,for the purposeset-forth.

6. A detachable grain-shoe having means thereon for engaging ashoe-shank by a rearward movement, andhaving its forward end adapted tobe engaged by a cam-lever, for the purpose set forth.

Intestimon y whereof we have hereunto set our hands, this 4th day ofSeptember, 1899, at Minneapolis, Minnesota.

THOMAS J. HOXVE. HENRY N. LABARE.

In presence of- A. 0. PAUL, RICHARD PAUL.

